[linux-lvm] Resizing a logical volume which is mounted (at /home)

[Kiran Rao]

Thanks Stuart.

That's what I did finally. Logged in as root in the console (in fact I
booted into recovery mode from GRUB in order to do this).
Also, to ensure that the underlying file system is also resized
accordingly, I used the -r option.

lvresize -r -L-20G vgme/lvhome
lvresize -r -L+20G vgme/lvroot

That did the trick. Thanks.

On Tue, Jan 17, 2012 at 11:45 PM, Stuart D. Gathman <stuart at bmsi.com> wrote:

> Long ago, Nostradamus foresaw that on Jan 16, Kiran Rao would write:
>
>  Now, I tried the GUI (system-config-lvm) tool to do this. I can click on
>> lvhome and try to resize it. However, the problem is that since I am
>> logged
>> in as a non-root user, the /home is mounted. Resizing requires one to
>> unmount it, but the unmount operation fails since I am mounted.
>>
>> How do I work around this?
>>
>
> Log out of GUI
> Switch to text console (on linux try Ctrl-Alt-F3 for vt3)
> Login as root Unmount /home
> resize2fs <device-for-home>
> # WARNING!  Make sure lvresize size is >= resize2fs size.  If you aren't
> # sure about the units, make lvresize larger than you think you made
> # the filesystem.  You can always expand the filesystems again, but
> # you can't undo shrinking the LV too far.
> lvresize <device-for-home>
> mount /home
>
> --
>              Stuart D. Gathman <stuart at bmsi.com>
>    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
> "Confutatis maledictis, flammis acribus addictis" - background song for
> a Microsoft sponsored "Where do you want to go from here?" commercial.
>
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